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Which of the following have species that can establish symbiotic relationship with other organisms?
1. Cnidarians
2. Fungi
3. Protozoa
Select the connect answer using the code given below.

(a) 1 and 2 only
(b) 2 and 3 only
(c) 1 and 3 only
(d) 1, 2 and 3



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Cnidarians: Cnidarians, such as corals and sea anemones, can form symbiotic relationships with other organisms. For example, coral reefs are formed through a mutualistic symbiosis between corals and photosynthetic algae called zooxanthellae. The corals provide shelter and nutrients to the zooxanthellae, while the zooxanthellae provide energy-rich compounds through photosynthesis.

Fungi: Fungi are known to form various types of symbiotic relationships. One well-known example is mycorrhizal associations, where fungi form symbiotic relationships with plant roots. In these associations, the fungi provide essential nutrients to the plants, such as phosphorus, while the plants provide sugars and other organic compounds to the fungi.

Protozoa: Protozoa encompass a diverse group of single-celled organisms, and some species are capable of establishing symbiotic relationships. For instance, certain protozoa form mutualistic relationships with termites by aiding in the digestion of cellulose in their gut. The protozoa break down cellulose into simpler compounds, which the termites can then utilize as a food source.


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